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127 lines
3.5 KiB
Python
127 lines
3.5 KiB
Python
#!/usr/bin/env python3
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import pytest
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from helpers.cluster import ClickHouseCluster, ClickHouseInstance
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from os.path import join, dirname, realpath
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import time
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import helpers.keeper_utils as ku
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import typing as tp
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cluster = ClickHouseCluster(__file__)
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CONFIG_DIR = join(dirname(realpath(__file__)), "configs")
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node1 = cluster.add_instance("node1", main_configs=["configs/keeper1.xml"])
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node2 = cluster.add_instance("node2", main_configs=["configs/keeper2.xml"])
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node3 = cluster.add_instance("node3", main_configs=["configs/keeper3.xml"])
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node4 = cluster.add_instance("node4", stay_alive=True)
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zk1, zk2, zk3, zk4 = None, None, None, None
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@pytest.fixture(scope="module")
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def started_cluster():
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try:
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cluster.start()
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node4.stop_clickhouse()
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node4.copy_file_to_container(
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join(CONFIG_DIR, "keeper4.xml"),
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"/etc/clickhouse-server/config.d/keeper.xml",
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)
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yield cluster
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finally:
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conn: tp.Optional[ku.KeeperClient]
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for conn in [zk1, zk2, zk3, zk4]:
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if conn:
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conn.stop()
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cluster.shutdown()
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def create_client(node: ClickHouseInstance):
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return ku.KeeperClient(
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cluster.server_bin_path, cluster.get_instance_ip(node.name), 9181
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)
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def test_reconfig_replace_leader(started_cluster):
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"""
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Remove leader from a cluster of 3 and add a new node via two commands.
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"""
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global zk1, zk2, zk3, zk4
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zk1 = create_client(node1)
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config = ku.get_config_str(zk1)
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assert len(config.split("\n")) == 3
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assert "node1" in config
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assert "node2" in config
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assert "node3" in config
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assert "node4" not in config
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for i in range(100):
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zk1.create(f"/test_four_{i}", "somedata")
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zk2 = create_client(node2)
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zk2.sync("/test_four_0")
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ku.wait_configs_equal(config, zk2)
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zk3 = create_client(node3)
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zk3.sync("/test_four_0")
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ku.wait_configs_equal(config, zk3)
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for i in range(100):
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assert zk2.exists(f"/test_four_{i}")
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assert zk3.exists(f"/test_four_{i}")
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assert ku.is_leader(cluster, node1)
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config = zk2.reconfig(joining=None, leaving="1", new_members=None)
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print("After removing 1 (leader)", config)
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assert len(config.split("\n")) == 2
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assert "node1" not in config
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assert "node2" in config
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assert "node3" in config
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assert "node4" not in config
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# wait until cluster stabilizes with a new leader
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while not ku.is_leader(started_cluster, node2) and not ku.is_leader(
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started_cluster, node3
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):
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time.sleep(1)
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# additional 20s wait before removing leader
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ku.wait_configs_equal(config, zk2, timeout=50)
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node4.start_clickhouse()
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config = zk2.reconfig(joining="server.4=node4:9234", leaving=None, new_members=None)
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ku.wait_until_connected(cluster, node4)
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print("After adding 4", config)
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assert len(config.split("\n")) == 3
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assert "node1" not in config
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assert "node2" in config
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assert "node3" in config
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assert "node4" in config
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zk4 = create_client(node4)
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ku.wait_configs_equal(config, zk4)
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for i in range(100):
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assert zk4.exists(f"test_four_{i}")
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zk4.create(f"/test_four_{100 + i}", "somedata")
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zk2.stop()
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zk2 = create_client(node2)
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zk2.sync("/test_four_0")
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ku.wait_configs_equal(config, zk2)
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zk3.stop()
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zk3 = create_client(node3)
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zk3.sync("/test_four_0")
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ku.wait_configs_equal(config, zk3)
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for i in range(200):
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assert zk2.exists(f"test_four_{i}") is not None
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assert zk3.exists(f"test_four_{i}") is not None
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